Spool



Aug. 29, 1933.

G. H. BIRD SPOOL Filed March 2, 1952 A TTORNEYS.

Patented Aug. 29, 1933 i j 1325p;

entree TATES PATENT 7 SPOOL George H. Bird, Brooklyn, N. Y.

Application March2, 1932. Serial N0. 596,180

'4 Claims. (01. 242-123 a This invention relates in general to spoolsand F e is a s lar View Showing the fastenparticularly to spools forribbon and the like. ing disc attached to the core. Such spools usuallyinclude a hollow or tubular Figure 11 i an nd view of another form ofcore of penetrable material. such as cardboard, 1 0 em y t v nt o 1 a 5and end flanges on the extremities of the core Figure 12 is afragmentarylongitudinal vertical 0 for retaining the ribbon or the likeon thespool. sectional view through one end thereof taken'on vOne object of myinvention is to provide a the 1ine-l2l2 of Fi spool of this characterembodying novel andim- Figure 1 s a m la V ew ow the manner provedfeatures of construction for connecting 0 atta ngli e fastening C1 o tethe end flanges to the core. Figure l l is .an end View of a furthermodifica 5 Another object is to provide means for connecttion of theinvention. ingend flanges to a core in a spool of this .char- Fig re i afra men ary v rtic l l n i n acter comprising a single piece or disc ofsheet Sectio al View 011 the ne 1 -15 0 F e metal having lugs or prongsto extend into and and, y

15 penetrate the interior of the core, the prongs Figure 16 s a lar V wShowing the a e being forced into the core by deformation of the ofattaching the fastening d to the disc after the latter has been appliedto the ends p c fi a y, describing the embodiment of the of. the core. 7invention illustrated in Figures 1 to 5 inclusive,

Other objects are to providesuch aspool which the spool comprises atubular core 1 formed of 20 h substantially fiat ds without any materialsuitable material such as. cardboard, and the ref- 75 projections, sothat the spools may be conerence characters 2 des'ignate'endflanges forthe veniently arranged in stacked relation end to core which havecentral openi a 0f a d a end, and to obtain other advantages and resultseter somewhat less than the internal diameter of as will be brought outby the following descripthe core. These end flanges are. secured to thetion. ends of the core by fastening discs 3 each of which 9 Referring tothe '-accompanying drawing in comprises a single sheet of metaloriginally conwhich corresponding and like parts are desigcave-convex,in cross section. Each disc has nated by, the same reference charactersthroughstruck up there from a-plurality of prongs 4 the out the severalviews, bases of which are spaced from the center of the Figure 1 isanend View of a spool embodying disc a distance somewhat. less than theinternal 3 my invention. radius of the core Each prong has an'rout-Figure 2 is a vertical sectional view through turned pointed end 5 andextends. in the direc-. the spool with portions of the end flangesbroken tion of the periphery of the disc 3, and the. prongs away. Uproject from the concave side of the disc,so that Figure 3 is a similarview showing the manne they may be easily slipped into thecore from one0 of applying the fastening disc. end thereof. f

Figure 4 is a transverse sectional view on the In assembling the endflanges and fastening line 4-4 of Figure 2. V V discs on the core, anend disc 2 is placed against Figure 5 is a similar View on the line 55of one end of the core, after which a fastening disc 40 Figure 2. 3 isplaced against the outside of the end disc Figure e-is longitudinalvertical sectional with the prongs 4 projecting into the cora -asviewthrough a modification of the invention indicated in'Figure 3 013, thedrawing. Then the wherein the fastening disc itself serves as an endcentral portion of the fastening disc is pressed flange, and showing themanner of inserting the inwardly of the core as shown in Figure 2 of the00 fastening disc into the core, one'fastening disc drawing. Due to theoriginal concavo-convex a being omitted. shape of the fastening disc,when the central por- Figure l is a similar view showing the fasteningtion is so pressed inwardly of the core, the pointed disc secured to thecore. ends 5 of the prongs are swung outwardly away Figure sis an endview of a modification of from the center of the disc and caused :topenethe invention.- trate the interior surface of the core, as clearlyFigure 9 is a fragmentary vertical longitudinal shown in Figure 2 of thedrawing. The central sectional view through the construction shownportion of the disc thus become concavo convex in Figui-e 8 taken on theline 9-9 of Figure-8, reversely to its original form and the prongs iand showing the manner of applying the fastenproject from the convexsideof said central poring disc to the core. tion. The fastening discsare'thus firmly secured 3 to the core and clamp the end discs 2 betweenthemselves and the core.

To prevent rotation of the end discs, each disc may be formed at theedges of its opening with notches 6 to receive the prongs 4, as shown inFigure 4. The prongs and fastening disc being non-rotatably secured tothe core and interlocking with the discs through the prongs 4 andnotches 6, effectually prevent rotation of the end flanges.

A modification of the invention is shown in Figures 6 and '1 wherein thefastening discs themselves serve as end flanges for the core. In thisform of the invention, the fastening discs are made of a diametergreater than that of the core, and the end flanges 2 are omitted. Thefastening discs are secured .to the core in exactly the same manner asdescribed in connection with Figures 1 to 5 inclusive.

A further modification of the invention is shown in Figures 8 to 10inclusive where the fastening discs 7 serve as the end flanges for thecore 8 and the fastening discs have stamped therefrom right-triangularears 9 each having one arm radial of the disc and its base facing in thedirection of the periphery of the disc. Each ear 9 also has 2. prong 10projecting from its base. The fastening discs are originallyconcave-convex in cross-section, and the ears 9 are so located that thebases are spaced from the center of the disc a distance slightly lessthan the radius of the interior of the core so asto easily slip into theend of the core.

In attaching the fastening discs to the core, the ears are slipped intothe core until the fastening disc abuts the end of the core whereuponthe central portion of the disc is pressed inwardly of the core so as tocause the ears 9 to swing outwardly toward the inner surface of the corewhich results in penetration of the core by the prongs 10 as shown inFigure 10 of the drawing. The fastening discs are thus firmly secured tothe core by the prongs 10, and the ears 9 serve as supports for the coreon the fastening discs, the bases of the ears snugly fitting against theinner surface of the core.

Another spool embodying a modification of the invention is shown inFigures 11 to 13inclusive. Here the fastening discs 12 are in generalthe same construction as the fastening discs 3 being concavo-convex incross-section and having prongs 13 to engage the inside of the core 14.An annular shoulder 15 of a diameter substantially equal to the interiordiameter of the core is formed on the concave side of each disc forsupporting the core on the discs. These discs 12 are applied to, thecore in the same manner as are the discs 3, and the shoulder 15 providesa positive support for the core in addition to the prongs13.

Figures 14 to 16 inclusive show another form of spool embodying amodification of the invention. In this form of spool the fastening discs16 are originally flat and have prongs v1'7 struck-up therefrom at oneside to originally slip easily into the core 18. After a disc has beenplaced against the end of the core as shown in Figure 16, a suit abletool is forced through the apertures 19 formed by the stamping of theprongs so as to force the prongs outwardly toward the periphery of thedisc and into the inner surface of the core. In all forms of theinvention the fastening disc periphery has 'a central opening 20toreceive a spindle upon which the spool may be mounted for winding andunwinding material on or from the spool, and preferably an integralinturned annular flange is provided at the edge of the opening toreenforce the central portion of the disc.

It will be observed that in all forms of the invention, the ends of thespool are substantially flat, so that the spools may be firmly stackedin endwise relation. The fastening means comprises a single piece ofmetal and may be secured to the core of the spool by a simple operation.Accordingly, a spool embodying the invention can be made quickly andeconomically, and at the same time will be strong and durable.

It will be understood that the end flanges 2 may be used in any form ofthe invention, according to the purpose for which the spool is to beused.

While I have shown and described the invention as embodied in certaindetails of construction it should be understood that many modiflcationsand changes may be made in the construction of the spool withoutdeparting from the spirit or scope of the invention.

Having thus described my invention, what I claim-is:

1. A spool comprising a tubular core of penetrable material, end flangestherefor, and a fastening device securing each end flange to one end ofsaid core, said fastening device comprising a metal disc overlying saidend flange and having a concavo-convex central portion with a circularrow of prongs projecting from the convex side thereof and penetratingthe interior walls of said tube, said disc having initially beenreversely concavo-convex in cross-section with said prongs projectingfrom the concave side thereof and at a distance from the center of thedisc less than the radius of the interior of said tube, and the centralportion of said disc having been pressed inwardly of said core to swingsaid prongs toward the periphery of the disc and cause the prongs topenetrate the interior walls of said core. a

2. A fastening device for securing end flanges on a tubular core ofpenetrable material, comprising a concavo-convex metal disc having acircular row of prongs projecting from the concave side thereof andspaced from the center of the disc a distance slightly less than theradius of the interior of said tubular core, so that by placing saiddisc against the end of said core with said prongs extending into thecore and pressing the central portion of said disc inwardly of saidcore, said prongs will be swung toward the periphery of the disc andwill penetrate the interior walls of said core.

3. The spool set forth in claim 1 wherein said end flanges have centralopenings somewhat smaller in diameter than the interior of said core,and the edges of said openings are formed with notches to receive saidprongs to prevent rotation of said end flanges on the core.

4. A fastening device for securing end flanges on a tubular core ofpenetrable material, comprising a concavo-convex metal disc having aplurality of right triangular ears stamped therefrom and projecting fromthe concave side thereof with one leg of each triangular earsubstantially radial of said disc, the bases of said earsbeing spacedfrom the center of the disc a distance substantially equal to the radiusof the interior of said core and having prongs projecting therefrom.

GEORGE H. BIRD.

